1, Lala's mother bought a bottle of salad oil, weighing 3.6 kg. Half of the oil is used, and the bottle weighs 1.9 kg. Lala's mother asked Lala, "I wonder how many kilograms this bottle of oil used to have?" How much does this bottle weigh? '

There are 50 students in one class. When 1 boys and 5 girls leave, the number is equal. How many boys are there?

3, 4, 4, 4, 4 = 2 You can add, subtract, multiply, divide and () symbols.

4. Xiao Minghua 1550 yuan bought 6 cars and 1 jeep, and spent 3650 yuan on 13 cars and 3 Jeeps. How much is each car model?

5. Two watermelons for each 5 yuan.

Q: 4 kg () yuan is 4000 g () yuan. The unit price of two watermelons is () yuan.

6, a batch of cement, with a car loading, with 45 cars, with a cart loading, as long as 36 cars, each cart is 4 tons more than the car, how many tons of cement * * *?

7. Dad spent 72 yuan to buy 8 kilograms of apples and 5 kilograms of bananas. The unit price of bananas is twice that of apples. How much are apples per kilogram? How much is a kilogram of bananas? (Solve in two ways)

8. The length and width of a rectangle are increased by 7 cm, and the area of the new rectangle is 2 17 cm more than the original rectangle. Find the perimeter of the original rectangle

9. In the division formula, the sum of divisor, dividend, quotient and remainder is 773. The quotient is 18 and the remainder is 26. What are the divisor and dividend?

10, the length of a rope is180cm, mark it at 3cm, mark it at 4cm, and then cut it at each marked place. A * *, how many segments can you cut?